Samuel Rodrigues Bonamichi do Couto
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View article: Efficacy of Short‐Term Timed Artificial Insemination Protocols With Estradiol Esters and <scp>PGF2α</scp> in Girolando Cows
Efficacy of Short‐Term Timed Artificial Insemination Protocols With Estradiol Esters and <span>PGF2α</span> in Girolando Cows Open
Using a synchronisation protocol based on estradiol esters and prostaglandin, established in cattle since the 1970s, we implemented 24 or 48‐h intervals between hormone administration and timed artificial insemination (TAI). This study com…
View article: Impact of bovine neosporosis on reproductive performance of Girolando cows from a closed herd in Brazil
Impact of bovine neosporosis on reproductive performance of Girolando cows from a closed herd in Brazil Open
View article: Postpartum diseases and their effects on reproduction in dairy cows
Postpartum diseases and their effects on reproduction in dairy cows Open
This study evaluated the effects of postpartum diseases and body condition score (BCS) on the reproductive performance of dairy herds. Cows were monitored during the postpartum to diagnose diseases and changes in BCS. The cows were divided…
View article: Excitable Temperament Impairs Oocyte Quality and in Vitro Embryo Production Efficiency in Nellore Donors
Excitable Temperament Impairs Oocyte Quality and in Vitro Embryo Production Efficiency in Nellore Donors Open
View article: Use of Progesterone as a Strategy to Improve Reproductive Efficiency in Cattle
Use of Progesterone as a Strategy to Improve Reproductive Efficiency in Cattle Open
Progesterone (P4) is a key hormone in the reproductive physiology of cattle, playing a crucial role in regulating the estrous cycle and establishing and maintaining the pregnancy. In the context of reproductive efficiency, the use of P4 ha…
View article: Relationships between follicle and corpus luteum size and vascularization with ovulation, progesterone production, and pregnancy in Nellore beef cattle
Relationships between follicle and corpus luteum size and vascularization with ovulation, progesterone production, and pregnancy in Nellore beef cattle Open
The objective of this study was to evaluate the relationships between preovulatory follicle (POF) and corpus luteum (CL) diameters, and POF and CL vascular perfusion with progesterone production, ovulation, and pregnancy in Nellore cows su…
View article: Weaning weight and optimization of reproductive efficiency in Nellore females subjected to timed artificial insemination
Weaning weight and optimization of reproductive efficiency in Nellore females subjected to timed artificial insemination Open
The objective of this study was to evaluate the effect of timed artificial insemination (TAI) on pregnancy rates, reproductive efficiency, and mean weaning weight of calves at the end of breeding season in Nellore females. In this work, 74…
View article: Weaning weight and optimization of reproductive efficiency in Nellore females subjected to timed artificial insemination
Weaning weight and optimization of reproductive efficiency in Nellore females subjected to timed artificial insemination Open
The objective of this study was to evaluate the effect of timed artificial insemination (TAI) on pregnancy rates, reproductive efficiency, and mean weaning weight of calves at the end of breeding season in Nellore females. In this work, 74…
View article: Ultrasonographic evaluation of the reproductive tract as predictors of pregnancy in Girolando heifers submitted to Timed Artificial Insemination
Ultrasonographic evaluation of the reproductive tract as predictors of pregnancy in Girolando heifers submitted to Timed Artificial Insemination Open
The objective of this study was to evaluate the influence of the degree of uterine and ovarian development on the pregnancy rate of Girolando heifers submitted to Timed Artificial Insemination (TAI). Fifty-six heifers, representing 100% of…
View article: Comparison of estradiol benzoate and cypionate in Girolando cows submitted to a timed artificial insemination
Comparison of estradiol benzoate and cypionate in Girolando cows submitted to a timed artificial insemination Open
The various studies on the manipulation of the estrous cycle culminated in the development of estrous and ovulation synchronization protocols, to the point of defining an optimum moment for artificial insemination. The induction of ovulati…
View article: Reproductive performance of Nelore cows submitted to FTAI and exposed to clean-up bulls
Reproductive performance of Nelore cows submitted to FTAI and exposed to clean-up bulls Open
The aim of this study was to evaluate the effect of FTAI associated with clean-up bulls on reproductive efficiency of Nellore females in a breeding season from November 2013 to June 2014. To this end, 744 Nellore females, lactating and non…
View article: Comparação da taxa de prenhez entre novilhas, primíparas e múltíparas da raça Nelore submetidas à inseminação artificial em tempo fixo
Comparação da taxa de prenhez entre novilhas, primíparas e múltíparas da raça Nelore submetidas à inseminação artificial em tempo fixo Open
Grillo G.F., Guimaraes A.L.L., Couto S.R.B., Abidu-Figueiredo M. & Palhano H.B. [Comparison of pregnancy rate between heifers, primiparous and multiparous Nellore submitted to artificial insemination fixed time.] Comparacao da taxa de pren…
View article: Comparison of pregnancy rate between heifers, primiparous and multiparous Nellore submitted to artificial insemination fixed time
Comparison of pregnancy rate between heifers, primiparous and multiparous Nellore submitted to artificial insemination fixed time Open
Grillo G.F., Guimarães A.L.L., Couto S.R.B., Abidu-Figueiredo M. & Palhano H.B. [Comparison of pregnancy rate between heifers, primiparous and multiparous Nellore submitted to artificial insemination fixed time.] Comparação da taxa de …
View article: Efficacy of different drugs on ovulation induction of dairy cows submitted to timed artificial insemination
Efficacy of different drugs on ovulation induction of dairy cows submitted to timed artificial insemination Open
Among the main estradiol esters used in cattle timed artificial insemination (TAI) programs, estradiol benzoate (EB) and estradiol cypionate (EC) has been commonly used because they low cost. But the estradiol estres present differences re…